I know the type. I wouldn't bother wasting energy trying to communicate factual information with her. I suggest not acknowledging anything she has to say until she is willing to make conversation a two-way street. Some people have problems with conversational skills and just need to be trained.

My mother was always cool, but my father was exactly how you describe your mom. It used to be arguements and such, basicaly him not listening and trying to overbear my point of view with loudness and aggression. I eventualy told him that conversation must be a two way street or it is a waste of energy even opening our mouths. Eventualy he learned how to have a proper conversation with me, but it took time.